Heating apparatus for incubators.



PIATENTED JAN. 28, 1908.

J. L. NIX. HEATING APPARATUS FOR INOUBATORS.

APPLICATION FILED NOV. 23, 1905.

JAMES L. NIX, OF'I'IOMER CITY, PENNSYLVANIA.

HEATING APPARATUS non mcune'roas'.

Specification of Letters Patent.

Patented Jan. 28,1908.

Application filed November 23.1905. Serial No. 288.766.

' To all whom it may concern:

v remedy Be it known that I, JAMEs L. NIX, a citizen of the UnitedStates, and resident of Homer City, Pennsylvania, have invented certainnew and useful Improvements in Heating.

Apparatus for Incubators, of which the following is a specification.

My invention relates to improvements in heating apparatus forincubators, and has for its object to rovidemeans for the equaldistribution of eat throughout the eggchamber of an incubator.

In the drawings-Figure 1 is a perspective view of an incubator embodyingthe rinciples of my invention, the incubator fieing cut away in verticallongitudinal mid-section. Fig. 2 is a perspective view of theheat-diffusing apparatus. Fig. 3 is a longitudinal vertical view inmid-section of the same.

My invention relates to that class of incubators in which theegg-chamber is heated by radiation from a hot air receptacle, and inwhich the receptacle is heated by the introduction of fumes from .alamp, or other suitable heat medium.

In the devices of this character, the fumes are introduced to theheating-receptacle, and

find an outlet from the heating-receptacle to the exterior of theincubator, while between their introduction to the heating-receptacleand their exit \from that receptacle, they serve to heat the metallicbottom of said receptacle, which in turn heats the air within theegg-chamber by radiation. The difiiculty attendant upon this mode ofheating has been found to reside mainly in the creation of eddyingcurrents of air within the heatingreceptacle. Where these currentsoccur,-

*they cause unequal heat distribution, ireto such an extent as to impairor the usefulness of the incubator. To this defect, I have devised thefol- I' provide a heatingquently destroy lowing apparatus.

receptacle, comprising a metallic bottom 5 This heat-receptacle may behorizontal cross-section, as and 3. The flue 7 passes vertically throughthe bottom 5 and top 6, the top 6 being provided'with an opening 8 forthat purpose. The flue 7 is provided and a top 6.

rectangular in with a horizontalfine' 9, which extends into theheating-receptacle 10, and preferably extends to a point beyond thecenter of the said heating-receptacle 10. The flue 7 is adapted toreceive at its lower extremity the .the metallic bottom 5,

through the chimney of the lamp or some other source of heat supply, thefumes from which will, when the top opening 11 of the said flue 7 isclosed, pass horizontally'through the flue 9 and bedischarged from theopen end of said flue 9 into the heating-receptacle 10. Above I haveprovided a rigid sheet 12, whose ends are bent over, as indicated bythenumeral 13, in order that the sheet 12 may be elevated a slight distanceabove the upper surface of the bottom 5, and be parallel therewith. Uponthe upper side of the sheet 12, I have provided a housing 13-inclosingthe flue 9 in the manner shown in the drawings, and being openat its top. The sheet 12 is cut away at the bottom of the housing 13*.The flue 9 is secured within the housing 13 by means of one or morebrackets 14. The heating receptacle 10 is also provided with a verticalflue 15 projecting top 6 to the exterior of the incubator, and itsloweropening being near to the bottom ofthe heat-receptacle.

By the described apparatus, I have provided ajheating-receptacle havingwhat may be termed a double'bottom, the air-space between the sheets 12and 5 being exceedingly thin. The heat of the flue 9 causes the airsurrounding the flue 9 and within the housing 13 to be first heated.This air being heated, rises and draws after it a supply of colder airthrough the thin air-space between the sheets 12 and 5. In this manner,the air within the heating-receptacle 10 is in constant motion,

and being compelled to circulate through the thin air-space referred to,the formation of eddying currents isprevented, and a substantiallyuniform distribution of heat throughout the entire surface of the bottom5 is accomplished. Q

Having thus described my invention, what I claim as new and desire tohave secured to meby the grant'o'f Letters Patent, is:

1. In' a device of the class described, a

heatin receptac1ehavin a metallic bottom,

a meta lic sheet mounte above and parallel with said bottom in such amanner as to leave a thin airspace between the same andsaid bottom, aheatin -flue horizontally disposed u on said metal ic sheet, and ahousing dispose around said flue said housing being 0 enat itstop andbottom, said metallic s eet having an opening therein which registerswith the open bottom of the housing substantially as described. v

. ing said flue, said housing being openat its I -top and bottom, ametallic. sheet Whereon said housing is mounted said metallic sheethavini an opening therein which registers with t e open bottom of thehousin and a metallic receptacle bottom mounted eneath and parallel withsaid sheet, substantially as 10 described.

,' In testirnony whereof, I h-ave signed my name to this specification,in presence of two subscribing witnesses. 7 JAMES L. Witnesses:

0.. O. WILLIAMS, G. C. HAMILTON.

